JP2006306841A - Two-layer type cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a two-layer type cosmetic having good feeling in use including moist feeling, emollient feeling, skin resilience-imparting effect and nonstickiness, good in such aesthetic appearance as to separate into a colorless and clear liquid layer and an emulsified layer when left at rest, and also good in redispersibility in use and storage stability. <P>SOLUTION: The two-layer type cosmetic is obtained by compounding (a) 0.01-10 mass% of lysophospholipids, (b) 0.01-20 mass% of an oil agent, (c) 0.0001-5 mass% of acetylated sodium hyaluronate, (d) 0.1-20 mass% of silica and (e) water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a two-layer cosmetic, and more specifically, by blending a specific amount of lysophospholipid, oil agent, acetylated sodium hyaluronate, silica and water, there is no stickiness and an unprecedented excellent moisturizing feeling. It also has an emollient feeling, excellent skin softening effect after use, separated into two layers upon standing, the upper layer is a colorless and transparent aqueous layer, the lower layer is also excellent in the appearance of the powder and emulsified layer, The present invention relates to a two-layered cosmetic material having good redispersibility during use and storage stability.

Conventionally, there are various types of two-layer cosmetics, such as those composed of two types of liquid layers, those composed of a liquid layer and a solid layer. It is to be used in a state.
As a two-layer cosmetic consisting of a liquid layer and a solid layer, a type consisting of an aqueous liquid layer and a powder layer, such as calamine lotion, is watery when used and finished with a smooth feel after use. Many products are on the market. When this type of cosmetic is left standing for a long period of time, the powder will solidify on the bottom of the container and easily cause a phenomenon called cake that does not re-disperse even if shaken. Proposal of a method (for example, see Patent Document 1) containing a functional polymer and powder, a method containing a hydrophobic powder and a volatile oil and / or ester oil (for example, see Patent Document 2), etc. It was. However, these methods are excellent in the original wateriness of this type and the smooth feel after use, but have not been able to sufficiently impart moisturizing feeling, emollient feeling, and skin softening effect after use.

There are also several types of two-layer cosmetics composed of two liquid layers, one is an oil layer and the other is an aqueous layer, which is emulsified by lightly shaking during use (for example, , See Patent Document 3.), one is already an emulsified layer and the other is an aqueous layer.
Since the two-layer cosmetic comprising an oil layer and a water layer is emulsified by simple mixing that is lightly shaken, it returns to the original two-layer state in a short time. That is, since the emulsified droplets at the time of use are unstable and the particle size is large and non-uniform, the conformity to the skin is poor, and the emollient effect and the skin softening effect after use cannot be sufficiently provided.
For this reason, there are two-layer cosmetics in which one layer is already emulsified and the other is an aqueous layer. However, this type has not been studied so far, and a satisfactory product has not been obtained. For example, a method of containing a salt of a specific sugar derivative and separating it into an emulsified layer and an aqueous layer (see, for example, Patent Document 4) has been proposed. Therefore, when a large amount of powder is blended, it is necessary to blend a large amount of an ionic substance, which is a salt of a sugar derivative, in order to promote two-layer separation. Causes coalescence of the emulsifying interface, resulting in destruction of the emulsified droplets, and it was difficult to ensure sufficient storage stability.

JP 2002-249417 A (page 1-8) Japanese Patent Laid-Open No. 7-267843 (page 1-4) Japanese Patent Laid-Open No. 4-112811 (page 1-3) JP 2003-137728 A (page 1-6)

  The present invention has no stickiness, has an excellent moisturizing feeling and emollient feeling, is excellent in skin softening effect after use, is separated into two layers upon standing, and has good redispersibility and storage stability during use. It is an object of the present invention to provide a two-layer cosmetic including an emulsified layer.

In view of such a situation, the present inventors have conducted intensive research to solve the above problems, and as a result, a specific amount of lysophospholipid, an oil agent, acetylated sodium hyaluronate, silica, and water are blended, and a two-layer type is obtained. By using it as a cosmetic, it has excellent moisturizing feeling, emollient feeling, skin softening effect after use, and non-stickiness, and when standing, it is separated into two layers, an emulsified layer and a liquid layer. The upper layer is a colorless and transparent water layer, and the lower layer is a powder and an emulsified layer, and it is found that a two-layer cosmetic having good redispersibility and storage stability during use can be obtained, and the present invention is completed. It came to.
That is, the present invention includes the following components (a) to (e);
(A) Lysophospholipid 0.01 to 10% by mass
(B) Oil agent 0.01-20 mass%
(C) Acetylated sodium hyaluronate 0.0001-5 mass%
(D) Silica 0.1-20 mass%
(E) To provide a two-layer type cosmetic characterized by containing water.

  The two-layer cosmetic of the present invention is excellent in use feeling such as moisturizing feeling, emollient feeling, skin softening effect after use, non-stickiness, excellent aesthetics of appearance when standing, redispersibility during use and Storage stability is good.

The configuration of the present invention will be described below.
The lysophospholipid of component (a) used in the present invention is blended as an emulsifier for emulsifying the oil of component (b) and has an isoelectric point of around pH 3.0 and is not lysed. Low compared to phospholipids. In general, it is known that an emulsion using a phospholipid exhibits excellent storage stability in the presence of an ionic substance, but an emulsion using the lysophospholipid of component (a) is lysed. By performing the above, excellent storage stability can be obtained even in the presence of a higher concentration of ionic substances.

  The lysophospholipid of the component (a) used in the present invention is not particularly limited. Specific examples include soybean-derived lysophospholipid, soybean-derived hydrogenated lysophospholipid, egg yolk-derived lysophospholipid, and egg yolk-derived hydrogenated lysophospholipid. Among them, from the viewpoint of storage stability, soybean-derived hydrogenated lysophospholipids and egg yolk-derived hydrogenated lysophospholipids are preferable, and the lysolysis rate is 60% or more, and the purity of phosphadidylcholine (hereinafter, “PC purity”) is preferably 20% or more. These lysophospholipids can be used singly or in combination of two or more as required.

  The amount of the lysophospholipid component (a) used in the present invention is 0.01 to 10% by mass (hereinafter simply referred to as “%”), preferably 0.1 to 5%. When the blending amount is less than 0.01%, sufficient storage stability cannot be obtained, and when it exceeds 10%, stickiness is strongly felt, which is not preferable.

The oil agent of the component (b) used for this invention is mix | blended for the purpose of providing emollient feeling and providing the skin softening effect after use. Although the oil agent used in the present invention is not particularly limited, specifically, as the oil agent derived from animals and plants, avocado oil, linseed oil, almond oil, olive oil, kyounin oil, whale wax, hydrogenated oil, wheat Germ oil, sesame oil, rice germ oil, rice bran oil, safflower oil, shea butter, soybean oil, corn oil, castor oil, hydrogenated castor oil, jojoba oil, macadamia nut oil, beeswax, mink oil, cottonseed oil, palm oil, hydrogenated palm Oil, lanolin; hydrocarbon oil, squalane, squalene, liquid paraffin, pristane, polyisobutylene, etc .; higher fatty acids include stearic acid, behenic acid, undecylenic acid, oleic acid, linoleic acid, linolenic acid, isostearic acid, 12- Hydroxy stearic acid, etc .; cholesterol, phytosterol, etc. as sterins As ester oils, isocetyl isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, tetra-2-ethylhexane Pentaerythritol acid, cetyl octanoate, oleyl oleate, octyldodecyl oleate, neopentyl glycol dicaprate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, di-2-ethylhexyl sebacate, cetyl lactate, lactic acid Myristyl, cholesteryl hydroxystearate, (hydroxystearic acid / stearic acid / rosinic acid) dipentaerythrityl, N-lauroyl-L-glutamic acid-2-octyldodecyl Steal, diisostearyl malate, etc .; As glyceride oil, triisostearic acid glyceride, tri-2-ethylhexanoic acid glyceride, monostearic acid glyceride, di-2-heptylundecanoic acid glyceride, etc .; Examples include chain-like substances such as siloxane and methylphenylpolysiloxane, and cyclic substances such as octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane.
Above all, from the viewpoint of giving emollient feeling and giving skin softening effect after use, vegetable oils such as avocado oil, olive oil, wheat germ oil, sesame oil, jojoba oil, macadamia nut oil, squalane, liquid paraffin, etc. Hydrocarbon oil, cholesterol, sterols such as phytosterol, ester oils such as cholesteryl hydroxystearate, triglycerides such as glyceryl tri-2-ethylhexanoate, glyceryl trioctanoate, dimethylpolysiloxane, methylphenylpolysiloxane, octamethyl Silicon oils such as cyclotetrasiloxane and decamethylcyclopentasiloxane are preferred. More preferred are vegetable oils such as avocado oil, olive oil, wheat germ oil, sesame oil, jojoba oil and macadamia nut oil, hydrocarbon oils such as squalane and liquid paraffin, and sterolins such as cholesterol and phytosterols. These oil agents can be used singly or in combination of two or more as required.

  The compounding quantity of the oil agent of the component (b) used for this invention is 0.01 to 20%, Preferably it is 0.1 to 10%. If the blending amount is less than 0.01%, the emollient feeling and the effect of imparting a skin softening effect after use are not sufficient, and if it exceeds 20%, stickiness is strongly felt, which is not preferable.

  The acetylated sodium hyaluronate of component (c) used in the present invention is an acetylated sodium hyaluronate, and has both hydrophilic and hydrophobic properties by introducing an acetyl group that is a hydrophobic group. As compared with sodium hyaluronate which is not acetylated, the spinnability is lowered and stickiness can be reduced. In addition, the adhesion with the surface of the stratum corneum having a partially hydrophobic surface is improved, and the familiarity with the skin can be improved. And the shielding effect which covers skin improves compared with sodium hyaluronate, it becomes possible to hold | maintain much water | moisture content to skin, and a moisturizing feeling and the skin softening effect after use also improve. Furthermore, acetylated sodium hyaluronate not only promotes separation into two layers of an emulsified layer and an aqueous layer by softly aggregating emulsified droplets in the emulsified layer as an action of the polymer, but also acts as an ionic substance, The salting-out effect also promotes separation into two layers, an emulsified layer enclosing hydrophobic powder and an aqueous layer, and is excellent in the effect of improving redispersibility and storage stability.

  The component (c) acetylated sodium hyaluronate used in the present invention is not limited in its production method or origin as long as sodium hyaluronate is acetylated, but has an average molecular weight of 5,000 to 1,000,000 and its minimum constitution Glucuronic acid and N-acetylglucosamine disaccharides with an average acetyl group substitution number of 2.0 to 4.0 excluding N-acetyl group give moisturizing feeling and skin softening effect after use From the viewpoint of two-layer separability, redispersibility, and storage stability, commercially available products include sodium acetylated hyaluronate (Shiseido Fine Chemicals Division) obtained by a fermentation method using microorganisms.

  The amount of the component (c) acetylated sodium hyaluronate used in the present invention is 0.0001 to 5%, more preferably 0.001 to 1%. When the blending amount is less than 0.0001%, the moisturizing feeling and the skin softening effect after use are not sufficient, and the effect of separating the emulsion layer and the aqueous layer into two layers and imparting redispersibility is not sufficient. Absent. If it exceeds 5%, stickiness is felt strongly, which is not preferable.

  The silica of component (d) used in the present invention is blended for the purpose of imparting a smooth feel without stickiness. The silica used in the present invention is not particularly limited in its shape, size, particle structure, etc., and can be any of spherical, substantially spherical, plate-like, porous, nonporous, specifically Are commercially available products such as Sunsphere NP-100 (manufactured by Dokai Chemical Co., Ltd.), God Ball E2-824C (manufactured by Suzuki Yushi Kogyo Co., Ltd.), and Siricia 550 (manufactured by Fuji Silysia Chemical Co., Ltd.). These silicas can be used singly or in combination of two or more as required.

Moreover, in order to exhibit a smoother feel without stickiness, those having an average particle diameter of 0.1 to 30 μm are preferable, and those having a specific surface area of 10 to 200 m ² / g are used. In addition, separation at the time of standing is promoted, the redispersibility at the time of use is excellent, and a product having good redispersibility and storage stability is obtained even after standing for a long time.

  The component (d) silica used in the present invention is incorporated into the emulsified layer during separation. The emulsified layer containing the component (d) is located in the lower part of the aqueous layer due to the specific gravity difference with the aqueous layer.

  The compounding quantity of the silica of the component (d) used for this invention is 0.1 to 20%, More preferably, it is 1 to 10%. If the blending amount is less than 0.1%, the effect of imparting non-stickiness is not sufficient, and if it exceeds 20%, the feel of the powder becomes strong, and the effect of imparting moisturizing feeling and emollient feeling is felt. It is not preferable because it is not sufficient.

  The component (e) water used in the present invention is an essential component for constituting a two-layer cosmetic including an emulsified layer, and contributes to the non-stickiness and the imparting of a moisturizing feeling.

The present invention makes it possible to obtain a two-layer cosmetic by combining the above specific amounts of lysophospholipid, oil, acetylated sodium hyaluronate, silica, and water.
That is, by softly aggregating emulsified droplets containing lysophospholipids through acetylated sodium hyaluronate, which is a water-soluble polymer, the area where the interfaces of the emulsified droplets contact each other is reduced, and coalescence is less likely to occur. . Therefore, it is possible to realize good redispersibility and storage stability even after standing for a long time (one year or more). As a result, it has the contradictory sensory characteristics of moisturizing feeling that is generally obtained with an aqueous component and emollient feeling that is obtained with an oily component, and is characterized by excellent aesthetics of two layers in appearance. The realization of cosmetics was made possible. In other words, a good feeling of use after intentionally making it into a two-layer type and shaking it is a feeling of use not found in single-layer cosmetics.

  In addition to the components described above, the two-layer cosmetic of the present invention includes components other than those described above, such as emulsifiers including phospholipids other than those described above, powders other than silica, and acetylated sodium hyaluronate. Aqueous components such as water-soluble polymers, alcohols and polyols, antioxidants, fragrances, preservatives, colorants, beauty agents, and the like can be blended within a range that does not impair the effects of the present invention.

  The use of the two-layer cosmetic of the present invention is not particularly limited, and examples thereof include skin lotion, cosmetic liquid, body lotion, makeup base, foundation, sunscreen and the like.

  EXAMPLES Next, although an Example is given and this invention is demonstrated further, this invention is not limited at all by these.

Examples 1 to 13 and Comparative Examples 1 to 4: Cosmetic liquids Cosmetic liquids having the compositions shown in Tables 1 and 2 below were prepared by the following manufacturing method, and (1) appearance, (2) storage stability, (3) re-treatment. Dispersibility (4) Moisturizing feeling, (5) Emollient feeling, (6) Skin softening effect after use, (7) Evaluation of non-sticky skin after use, evaluated by the following method and combined results Tables 1 and 2 show the results.

(Manufacturing method)
A: Components (1) to (5) are uniformly mixed at 70 ° C.
B: A part of the component (12) is heated to 70 ° C.
C: B is added to A and emulsified.
D: C is cooled.
E: The component (8) swollen by a part of the component (12) and the components (9), (10), and (11) are added to D and mixed.
Components (6) and (7) swollen with the remainder of component (12) were added to F: E and mixed to obtain a cosmetic liquid.

[Evaluation method: (1) Appearance]
The cosmetic liquids of Examples 1 to 13 and Comparative Examples 1 to 4 were allowed to stand at room temperature for 1 day, and the appearance was visually determined according to the following (I) three-stage criteria.
(B) Three-stage criteria (Evaluation): (Judgment)
The upper layer is separated into two colorless and transparent layers: ○
Although separated into two layers, the upper layer is cloudy: △
Not separated into two layers: ×

[Evaluation method: (2) Storage stability]
The cosmetic liquids of Examples 1 to 13 and Comparative Examples 1 to 4 were stored in a constant temperature bath at 40 ° C. for 1 month, and the state of oil floating due to the destruction of the emulsified droplets was visually observed based on the state immediately after preparation. (B) Judgment was made according to a four-step criterion.
(B) Four-step criteria (Evaluation): (Judgment)
No change: ◎
Although there is slight destruction of the emulsified droplets, there is almost no oil floating on the surface of the liquid layer: ○
Some oil floating is seen on the surface of the liquid layer: △
Oil float can be seen on the surface of the liquid layer: ×

[Evaluation method: (3) Redispersibility]
Each cosmetic liquid of Examples 1 to 13 and Comparative Examples 1 to 4 is stored in a thermostatic bath at 25 ° C. for 1 month, and the redispersibility when each sample after standing for 1 month is shaken 10 times is as follows. (C) Judgment was made according to a three-step criterion.
(C) Three-stage criteria (evaluation): (judgment)
Re-dispersed into a single layer: ○
Partially redistribute: △
Do not redistribute: ×

[Evaluation Method: Usability of (4) to (7)]
Twenty females with a makeup history of 10 years or more were asked to use each serum of Examples 1 to 13 and Comparative Examples 1 to 4 on a panel. (4) Moisturizing feeling, (5) Emollient feeling, (6) Use Each item of skin softening effect after (7) non-stickiness after use was subjected to sensory evaluation according to the following (d) 5-step evaluation criteria, and the average score of all panels was (e) 4 Judgment was made using stage criteria.
(D) Five-level evaluation criteria (Evaluation): (Grade)
Very good: 5 points Good: 4 points Normal: 3 points Defect: 2 points Very bad: 1 point (e) 4-step criteria (average value of all panel scores): (Judgment)
Average score of 4.5 or more: ◎
Average score of 3.5 or more and less than 4.5: ○
Average score of 2.5 or more and less than 3.5: △
Average score of less than 2.5: ×

  As is clear from the results of Tables 1 and 2, the cosmetic liquids of Examples 1 to 13 which are the products of the present invention have a moisturizing feeling and an emollient feeling compared to Comparative Examples 1 to 4, It was a two-layer essence that was excellent in use feeling such as skin softening effect and non-stickiness after use, separated into two layers upon standing, and had good redispersibility and storage stability during use. On the other hand, the comparative example 1 which mix | blended the phospholipid which has not been lysated was inferior in storage stability. The comparative example 2 which did not mix | blend an oil agent was inferior to an emollient feeling, and the comparative example 3 which mix | blended sodium hyaluronate into which the hydrophobic group was not introduce | transduced was not isolate | separated into two layers. Further, Comparative Example 4 in which crystalline cellulose was blended instead of silica was inferior in redispersibility.

Example 14: Lotion (Ingredient) (%)
1. Egg yolk-derived hydrogenated lysophospholipid (Note 7) 0.05
2. Glycerin 0.5
3. 1,3-butylene glycol 0.5
4). Jojoba oil 0.5
5. Dimethylpolysiloxane (6 mPa · s) 0.5
6). Acetylated sodium hyaluronate (Note 8) 0.5
7). Hydroxyethyl cellulose 0.02
8). Ethanol 10
9. Perfume appropriate amount10. Mallow extract 0.1
11. Nonporous spherical silica (Note 5) 1
12 Purified water remaining amount Note 7: lysification rate 68% PC purity 30%
Note 8: Average molecular weight 200,000 Acetyl group substitution number 3.0

(Manufacturing method)
A: Components (1) to (5) are uniformly mixed at 70 ° C.
B: A part of the component (12) is heated to 70 ° C.
C: B is added to A and emulsified.
D: C is cooled.
E: Component (7), components (8) to (10) and component (11) swollen with a part of component (12) are added to D and mixed.
F: (6) swollen with the remainder of component (12) was added to E and mixed to obtain a skin lotion.

  The lotion of Example 14 has a moisturizing feeling and an emollient feeling, is excellent in use feeling such as skin softening effect and non-stickiness after use, and is separated into two layers at the time of standing, redispersibility and storage at the time of use. It was a two-layer lotion with good stability.

Example 15: Body lotion (ingredient) (%)
1. Soybean-derived hydrogenated lysophospholipid (Note 9) 0.3
2. Glycerin 1
3. 1,3-butylene glycol 2
4). Olive oil 1
5. Acetylated sodium hyaluronate (Note 10) 1
6). Sclerotium gum 0.05
7). Ethanol 10
8). Perfume appropriate amount 9. l-Menthol 0.02
10. Nonporous spherical silica (Note 5) 2
11. Purified water Remaining Note 9: Rezonization rate 88% PC purity 80%
Note 10: Average molecular weight 5000 Acetyl group substitution number 3.5

(Manufacturing method)
A: Components (1) to (4) are uniformly mixed at 70 ° C.
B: A part of the component (11) is heated to 70 ° C.
C: B is added to A and emulsified.
D: C is cooled.
E: Component (6), components (7) to (9) and component (10) swollen with a part of component (11) are added to D and mixed.
F: (5) swollen with the remainder of component (11) was added to E and mixed to obtain a body lotion.

  The body lotion of Example 15 has a moisturizing feeling and an emollient feeling, is excellent in use feeling such as a skin softening effect and non-stickiness after use, and is separated into two layers upon standing, and is redispersible and preserved during use. It was a two-layer body lotion with good stability.

Example 16: Foundation (component) (%)
1. Soybean-derived hydrogenated lysophospholipid (Note 1) 1
2. Phytosterol 0.05
3. Glycerin 2
4.1,3-Butylene glycol 3
5. Squalane 2
6). Decamethylcyclopentasiloxane 2
7). Cetanol 0.5
8). Titanium oxide 4
9. Talc 1
10. Bengala 0.1
11. Yellow iron oxide 0.7
12 Black iron oxide 0.02
13. Nonporous spherical silica (Note 5) 1
14 κ-Carrageenan 0.05
15. Calcium chloride 0.2
16. Acetylated sodium hyaluronate (Note 3) 1
17. Ethanol 10
18. Purified water remaining

(Manufacturing method)
A: A part of components (1) to (3) and (4) and (5) to (7) are uniformly mixed at 70 ° C.
B: A part of the component (18) is heated to 70 ° C.
C: B is added to A and emulsified.
D: C is cooled.
E: A part of component (4) and (8) to (13) are mixed with a roller.
F: Add E, component (14) swollen with part of component (18), and component (17), and mix.
G: The component (16) swollen with the remainder of the component (15) and the component (18) was added to F and mixed to obtain a foundation.

  The foundation of Example 16 is excellent in feeling of use such as moisturizing feeling, emollient feeling, skin softening effect after use, non-stickiness, separated into two layers upon standing, and excellent in redispersibility and storage stability during use. It was a two-layer foundation.

Example 17: Sunscreen (Ingredient) (%)
1. Soybean-derived hydrogenated lysophospholipid (Note 11) 1
2. Glycerin 3
3. 1,3-butylene glycol 1
4). Decamethylcyclopentasiloxane 2
5. Paramethoxycinnamic acid-2-ethylhexyl 3
6). Liquid paraffin 2
7). Acetylated sodium hyaluronate (Note 12) 0.5
8. Sodium 2-phenylbenzimidazole-5-sulfonate 3
9. Nonporous spherical silica (Note 13) 1
10. Ethanol 10
11. Purified water remaining amount Note 11: 90% lysation ratio PC purity 70%
Note 12: Molecular weight 400,000 Acetyl substitution number 3.2
Note 13: Sunsphere NP30 (manufactured by Dokai Chemical Industries, Ltd. average particle size 3 μm, specific surface area 40 m ² / g)

(Manufacturing method)
A: Components (1) to (6) are uniformly mixed at 70 ° C.
B: A part of the component (11) is heated to 70 ° C.
C: B is added to A and emulsified.
D: C is cooled.
E: Add component (8) and components (9), (10) dissolved in part of component (11) to D and mix.
F: (7) swollen with the remainder of the component (11) was added to E and mixed to obtain a sunscreen.

  The sunscreen of Example 17 is excellent in use feeling such as moisturizing feeling, emollient feeling, skin softening effect after use, and non-stickiness, and is separated into two layers upon standing, redispersibility and storage stability during use. Was a good two-layer sunscreen.

Claims (4)

The following components (a) to (e);
(A) Lysophospholipid 0.01 to 10% by mass
(B) Oil agent 0.01-20 mass%
(C) Acetylated sodium hyaluronate 0.0001-5 mass%
(D) Silica 0.1-20 mass%
(E) A two-layer cosmetic comprising water. The component (c) has an average molecular weight of 5,000 to 1,000,000, and an average acetyl group substitution number excluding the N-acetyl group in the disaccharides of glucuronic acid and N-acetylglucosamine, which are the minimum structural units, is 2.0 to The two-layer cosmetic according to claim 1, wherein the cosmetic is 4.0. The two-layer cosmetic according to claim 1 or 2, wherein the component (d) is a non-porous powder having an average particle size of 0.1 to 30 µm. The two-layer cosmetic according to any one of claims 1 to 3, wherein the upper layer is a colorless and transparent aqueous layer and the lower layer is a powder and an emulsified layer at the time of standing.